Help:Substitution/tl;dr

This page should summarize the procedures of substitution for advanced editors who keep forgetting which syntax does what:

I want to...

...insert template's inside

Use {{subst:t|..}}

...insert templates's inside and subtemplates' insides too

Use {{{{{|subst:}}}subt|..}} or {{{{{|safesubst:}}}subt|..}} in the template

subst: will show up on the template page, whereas safesubst: not

...delay a substitution one edit later

Use {{subst:subst}}t|...}}

...have a control over a substitution of subtemplates

Use {{{{{subst|}}}subt|..}}, deeper substitutions like: {{{{{subst|}}}subt|..|subst={{{subst2|}}}}}

{{t|..}} (no substitution)

{{subst:t|..}} (one-level substitution)

{{subst:t|subst=subst:|..}} or {{subst:t|subst=safesubst:|..}} (two-level substitution)

{{subst:t|subst=subst:|subst2=subst:|..}} or {{subst:t|subst=safesubst:|subst2=safesubst:|..}} (three-level substitution)

...make a preload page with includeonly/noinclude tags

Use <include<includeonly />only> or <no<includeonly />include>

...show template code instead of the template

Use {{msgnw:t}}